The connector on the orange wire plugs into the fuse box. The connector on the brown wire connects into the connector on the orange wire. It most likely goes on IGN or ACC terminal, where you currently have other things connected. Those would be used for accessories that could be added to the car.
Blower motor uses brown as does Power-Flow ventilation. If that orange has a black stripe, it was used for power seat, power windows
Vikki 1969 Goldenrod Yellow / black 400 convertible numbers matching
